Zhou Jianyu, Wang Sheng, Yuan Fang, Zhang Junshuo, Liu Shuai, Zhao Chunyu, Wang Yu, Gong Xinglong
CAS Key Laboratory of Mechanical Behavior and Design of Materials, Department of Modern Mechanics, CAS Center for Excellence in Complex System Mechanics, University of Science and Technology of China (USTC), Hefei 230027, P. R. China.
State Key Laboratory of Fire Science, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, PR China.
ACS Appl Mater Interfaces. 2021 Feb 10;13(5):6575-6584. doi: 10.1021/acsami.0c18308. Epub 2021 Jan 31.
A novel shock-resistant, self-generating triboelectric nanogenerator (SS-TENG) with high-speed impact energy-harvesting and safeguarding properties was developed by assembling Kevlar fiber and conductive shear-stiffening gel. The SS-TENG with energy-harvesting property generated a maximum power density of 5.3 mW/m with a voltage of 13.1 V under oscillator compression and could light up light-emitting diode arrays. Owing to the energy absorption effect, the as-designed SS-TENG could dissipate impact forces from 2880 to 1460 N, showing anti-impact performance under the drop hammer impact. It also sensed the loading forces by outputting 36.4 V. Functionalized as a self-powered sensor, SS-TENG monitored various human movements and provided protection from hammer impact. Interestingly, a wearable sole array with high sensitivity and a fast response could distinguish toe in/out motions. More importantly, this functional SS-TENG presented excellent anti-impact behavior, which dissipated 94% of kinetic energy under bullet-shooting excitation. It also gathered high speed ballistic energy, which outputted a maximum power density of 3 mW/m. To this end, this SS-TENG with a protection effect and the ability to harvest various impact energy showed promising applications in new power sources, intelligent wearable systems, and safeguard areas.
通过将凯夫拉尔纤维和导电剪切增稠凝胶组装在一起，开发出了一种具有抗冲击、自发电特性的新型摩擦纳米发电机（SS-TENG），它具备高速冲击能量收集和防护性能。具有能量收集特性的SS-TENG在振荡器压缩下产生的最大功率密度为5.3 mW/m，电压为13.1 V，能够点亮发光二极管阵列。由于能量吸收效应，所设计的SS-TENG能够将冲击力从2880 N消散至1460 N，在落锤冲击下表现出抗冲击性能。它还通过输出36.4 V来感知加载力。功能化为自供电传感器的SS-TENG可监测各种人体运动，并提供防锤击保护。有趣的是，具有高灵敏度和快速响应的可穿戴鞋底阵列能够区分脚趾内/外运动。更重要的是，这种功能性SS-TENG表现出优异的抗冲击性能，在子弹射击激发下能够消散94%的动能。它还能收集高速弹道能量，输出的最大功率密度为3 mW/m。为此，这种具有保护作用且能够收集各种冲击能量的SS-TENG在新型电源、智能可穿戴系统和防护领域显示出了广阔的应用前景。
